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compare: onyx_online:f7534c78d12789798687aef70d3199b65f4eab66
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onyx_online:main

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401bd4201b ... f7534c78d1

3 changed files with 18 additions and 14 deletions
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12
day-13/internal/one/solve.go
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@ -18,20 +18,22 @@ func Solve(buf []byte) (int, error) {
var total int
for _, m := range machines {
denominator := m.A.X*m.B.Y - m.B.X*m.A.Y
a_numerator := m.Prize.X*m.B.Y - m.Prize.Y*m.B.X
b_numerator := m.Prize.Y*m.A.X - m.Prize.X*m.A.Y
denominator := ((m.A.X * m.B.Y) - (m.B.X * m.A.Y))
a_numerator := ((m.Prize.X * m.B.Y) - (m.Prize.Y * m.B.X))
b_numerator := ((m.Prize.Y * m.A.X) - (m.Prize.X * m.A.Y))
a := float64(a_numerator) / float64(denominator)
b := float64(b_numerator) / float64(denominator)
if a != math.Round(a) || a < 0 || b != math.Round(b) || b < 0 {
if a != math.Round(a) || b != math.Round(b) {
continue
}
log.Debug(a, b)
total += 3*int(a) + int(b)
if a > 0 && b > 0 {
total += 3*int(a) + int(b)
}
}
return total, nil

12
day-13/internal/two/solve.go
View File

@ -23,20 +23,22 @@ func Solve(buf []byte) (int, error) {
m.Prize.X += augment
m.Prize.Y += augment
denominator := m.A.X*m.B.Y - m.B.X*m.A.Y
a_numerator := m.Prize.X*m.B.Y - m.Prize.Y*m.B.X
b_numerator := m.Prize.Y*m.A.X - m.Prize.X*m.A.Y
denominator := ((m.A.X * m.B.Y) - (m.B.X * m.A.Y))
a_numerator := ((m.Prize.X * m.B.Y) - (m.Prize.Y * m.B.X))
b_numerator := ((m.Prize.Y * m.A.X) - (m.Prize.X * m.A.Y))
a := float64(a_numerator) / float64(denominator)
b := float64(b_numerator) / float64(denominator)
if a != math.Round(a) || a < 0 || b != math.Round(b) || b < 0 {
if a != math.Round(a) || b != math.Round(b) {
continue
}
log.Debug(a, b)
total += 3*int(a) + int(b)
if a > 0 && b > 0 {
total += 3*int(a) + int(b)
}
}
return total, nil

8
day-13/internal/util/util.go
View File

@ -35,15 +35,15 @@ func ParseLines(r io.Reader) ([]*machine.Machine, error) {
matches = append(matches, m)
}
if err := scanner.Err(); err != nil {
return nil, err
}
var machines []*machine.Machine
for i := 0; i < len(matches); i += 3 {
machines = append(machines, machine.New(matches[i], matches[i+1], matches[i+2]))
}
if err := scanner.Err(); err != nil {
return nil, err
}
return machines, nil
}